Shock-absorber for motor-cars and other vehicles.



M. DERIHUN.

sHocK ABSORBER FOR MOTOR CARS AND OTHER VEHICLES.

APPLICATION FILED AUG, 19H.

Patented Jan. T, 1919.

WITNESSES the construction of tiall MARTIN DERIHON,

SHOGK-ABSORBER FOR MOIORMARS AN D OTHER VEHCLl-El.

Specification of Letters Patent.

Patented dan. t,

' .Application filed August 6, 1917. ,Serial No. llllf.

To all w/wm t may camorra Be it known that l, MARTIN Brannon, a subject of the King of Belgium, residing at Openshaw, Manchester, England, have invented certain new and useful Improvements in Shock-Absorbers for Motor-Cars and other Vehicles, of which the following is a specification.

This invention relates to shock absorbers for motor-cars and other suspended vehicles, said shockabsorbers beirg of the kind described in my United States Patent No. 1068329 dated the 22nd day of July, 1913, the said shock absorber being such that it permits of the tree compression and the free expansion of the suspension spring and exercises a retarding action only on vthe return movements toward the normal position. This retarding action is of a constant value in the two directions, however `great may be the amplitudes of vibration of the suspension springs.

The said prior patent described how the above result could be attained by means of a cylinder or fluid and containing a piston or pistons or ro tary blades, connected with the axle of the vehicle and arranged in such a manner as not to exercise any influence on the elastic compres` sion and expansion or" the springs, .that is to say, on the relative displacements which occur between the chassis of the vehicle and the hub ci the wheels when the latter encounter an iunev'enness or a depression in the road, but to retard the rapidity of the return movements toward normal position (which follow the said compression or the said exf pansion of the spring) and this with a conetant resistance whatever may be the position taken by the piston or the blades.

The speciiication of the said Patent No. 1068329 particularly described. an arrangenient comprising, valves carried by two blades in one piece, which are movable in relation to a fixed wall or partition in an oill cylinder in such a manner that either one or theother of the said valves openslaccording to the direction of displacement from the normal position oft' the spring. The portion of the cylinder between each of the two blades (placed in the norinal-position) and the fixed wall is bored to a diameter larger than that of the circumference described by the external edges of the blades, so as to allowthe blade, which has been brought to that part, to oscillate without any resistance,

chamber filled with Voil or other cylinder.

while'the other blade, thus engaged in the truly-bored portion of the cylinder, acts as a piston when the blade returns to thc normal position. i

The present invention relates to a. modification ofjthe above arrangement and consists 4in the fact that the passage oi the cil trom the chambers comprised between each oi the blades and the iixed partition into the chamber inclosed between the two blades is'eifected by means of' a conduit in .or along ono of the walls of the cylinder.

Figure l of the acconipanyino drawings is a section through a shock absorber according to the present invention.

Fig4 2 is a side elevation.

The apparatus consists of an oil cylinder a partitioned in the middle by a. transverse partition or plate g. A double piston .f3-ol moves in the cylinder other of the partition y, around pin o. Uyl# indero is fixed to the chassis of the vehicle, while the blades e--rl are connected with the axle by means of a lever and a suitable link gear.

Each of the pistons e and al has a drilled openin 21,- t-hese openings c' are closed alternately y ilaps or valves c which can open downward.

ln order to admit of the oil passing," freely trom one side to the other of the piston While the latter is moving away from the normal position, communication between the two compartments of the cylinder, when the blades approach the iixed partition g, is es tablished by` conduits in the walls of the They are formed, in. the apparatus represented by openings m and n, made in the cylindrical wall ot' the cylinder c, rev spect-ively near` the edge of blades c and nl when they are in their normal position and near the fixed partition g; a part" or channel y' applied externally the openings m to communicate with the correspondingopenings a.

From the above it follows that when the spring of the vehicle is compressed or ero pands, the blades e and (l oscillare around pin. and the valve'c 'ot that blade which moves upward then opens, while the blade which moves downward opens the conduit establishing the communication between the two compartments of cylinder o.

ln this manner, no retarding action is produced. On the contrary, duringa the return motion, the valve of the. blade which redeo on one side and the Bti,

llt)

on cylinder o causes" l ll U l action.

scende, closes and produces the i'etarding This retarding action is constant however large muy. be the displacement ot' the venes.

Having fully described my inventionpvlmt` I desire to claim and secure ify Letters Put ent is :H

A shock absorber for vehicles comprising a cylinder'dapted to contain a fluid, a lixed' partition therein, two piston blades movame in the cylinder relatively to the fxedpartr-htion, valves carried by the blades adapted l respectively to open accordin to the dire@ tion of movement of the bla es, and channel members applied to the outside of the cylinder and which provide ducts concentric to the cylinder to connect openings made' in the circumferential wall of the cylinder between the normal position of the blades and the xed partition.

ln testimony whereofl have hereunto set my hand in presence of two subscribing Wit- .messes MARTIN DERIHON. Witnesses y CHAS. P. PRESSLY DoLrHY KAHN. 

